linux-kernel - [PATCH -next] staging: comedi: dt2814: remove set but not used variables 'data'

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Message-ID: <20191023074827.33264-1-yuehaibing@huawei.com>
Date:   Wed, 23 Oct 2019 15:48:27 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <abbotti@....co.uk>, <hsweeten@...ionengravers.com>,
        <gregkh@...uxfoundation.org>, <yuehaibing@...wei.com>
CC:     <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] staging: comedi: dt2814: remove set but not used variables 'data'

drivers/staging/comedi/drivers/dt2814.c:193:6:
 warning: variable data set but not used [-Wunused-but-set-variable]

It is never used, so can be removed.

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 drivers/staging/comedi/drivers/dt2814.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/comedi/drivers/dt2814.c b/drivers/staging/comedi/drivers/dt2814.c
index d2c7157..e7c6787 100644
--- a/drivers/staging/comedi/drivers/dt2814.c
+++ b/drivers/staging/comedi/drivers/dt2814.c
@@ -186,21 +186,17 @@ static int dt2814_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 
 static irqreturn_t dt2814_interrupt(int irq, void *d)
 {
-	int lo, hi;
 	struct comedi_device *dev = d;
 	struct dt2814_private *devpriv = dev->private;
 	struct comedi_subdevice *s = dev->read_subdev;
-	int data;
 
 	if (!dev->attached) {
 		dev_err(dev->class_dev, "spurious interrupt\n");
 		return IRQ_HANDLED;
 	}
 
-	hi = inb(dev->iobase + DT2814_DATA);
-	lo = inb(dev->iobase + DT2814_DATA);
-
-	data = (hi << 4) | (lo >> 4);
+	inb(dev->iobase + DT2814_DATA);
+	inb(dev->iobase + DT2814_DATA);
 
 	if (!(--devpriv->ntrig)) {
 		int i;
-- 
2.7.4